The concat() method of Bytes Class in the Guava library is used to concatenate the values of many arrays into a single array. These byte arrays to be concatenated are specified as parameters to this method.
For example: concat(new byte[] {1, 2}, new byte[] {3, 4, 5}, new byte[] {6, 7}
returns the array {1, 2, 3, 4, 5, 6, 7}.
Syntax:
public static byte[] concat(byte[]... arrays)
Parameter: This method accepts arrays as parameter which is the byte arrays to be concatenated by this method.
Return Value: This method returns a single byte array which contains all the specified byte array values in its original order.
Below programs illustrate the use of concat() method:
Example 1:
// Java code to show implementation of // Guava's Bytes.concat() method import com.google.common.primitives.Bytes;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating 2 Byte arrays
byte [] arr1 = { 1 , 2 , 3 , 4 , 5 };
byte [] arr2 = { 6 , 2 , 7 , 0 , 8 };
// Using Bytes.concat() method to combine
// elements from both arrays into a single array
byte [] res = Bytes.concat(arr1, arr2);
// Displaying the single combined array
System.out.println(Arrays.toString(res));
}
} |
[1, 2, 3, 4, 5, 6, 2, 7, 0, 8]
Example 2:
// Java code to show implementation of // Guava's Bytes.concat() method import com.google.common.primitives.Bytes;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating 4 byte arrays
byte [] arr1 = { 1 , 2 , 3 };
byte [] arr2 = { 4 , 5 };
byte [] arr3 = { 6 , 7 , 8 };
byte [] arr4 = { 9 , 0 };
// Using Bytes.concat() method to combine
// elements from both arrays into a single array
byte [] res = Bytes.concat(arr1, arr2, arr3, arr4);
// Displaying the single combined array
System.out.println(Arrays.toString(res));
}
} |
[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]